Brueninghaus Hydromatik Rexroth A4VSG Pump Pump model A4VSG71 A4VSG125 A4VSG180 A4VSG250 A4VSG355 A4VSG500 A4VSG750 A4VSG1000 www.hydpump.com Closed circuit variable hydraulic piston A4VG pump Axial piston, swash plate design, variable displacement pump model A4VSG is designed for hydrostatic transmissions in closed circuit. Flow is proportional to input speed and displacement, and is infinitely variable by adjustment of the swash plate. Nominal pressure 5100 psi (350 bar). Peak pressure 5800 psi (400 bar) Ordering code: A A4VS G 250 DR / 30 -- R P P B 10 N00 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 Fluid 2 Version 3 Axial piston unit 4 Operation model 5 Size 6 Control device 7 Series 8 Direction of rotation 9 Seals 10 Shaft end 11 Mounting flange 12 Port connections 13 Through drive 14 Valves 15 Filtration
Axial piston, swash plate design, variable displacement pump model A4VSG is designed for hydrostatic transmissions in closed circuit. Flow is proportional to input speed and displacement, and is infinitely variable by adjustment of the swash plate. Nominal pressure 5100 psi (350 bar). Peak pressure 5800 psi (400 bar)
8 Direction of rotation: R= right. L= left (Viewed on shaft end)
9 Seals: P= NBR (Nitrile rubber to DIN ISO 1629) with shaft seal FPM
V= FPM (Fluoride rubber to DIN ISO 1629)
10 Shaft end: P= Metric Parallel with key to DIN 6885
Z= Metric splined shaft per DIN 5480
11 Mounting flange: B= ISO 4-bolt
12 Port connections: 10=Port A,B: SAE on the side (same side), metric mounting threads
13 Through drive: N00= Without auxiliary pump, without through drive
K31= ISO 125, 4-hole, Splined shaft 32x2x30x14x9g, A4VSO/H/G 40
K33= ISO 140, 4-hole, Splined shaft 40x2x30x18x9g, A4VSO/H/G 71
K34= ISO 160, 4-hole, Splined shaft 50x2x30x24x9g, A4VSO/H/G 125
K34= ISO 160, 4-hole, Splined shaft 50x2x30x24x9g, A4VSO/G 180
K35= ISO 224, 4-hole Splined shaft 60x2x30x28x9g, A4VSO/H/G 250
K99= With through drive, without hub or intermediate flange, with cover closed
14 Valves: 0= Without valve block
9= Valve block SDVB mounted
15 Filtration: N= Without filter
F= Filter in boost circuit, mounted
Features： – slot-controlled swashplate design – infinitely variable adjustment of displacement – reversible flow – permissible nominal pressure 350 bar – low noise level – long service life – drive shaft capable of absorbing axial and radial loads – operation on HF fluids possible with reduced operating parameters
– high power/weight ratio – modular design – short control times – through drive and tandem pumps possible – pump swivel angle indicator –installation position optional –Interchangeable with original Rexroth pump of same model
Variable displacement pump A4VSG, series 1 and 2 Hydraulic Fluid The A4VSG pumps in the standard design, should be used with good quality, petroleum oil based, anti-wear hydraulic fluids. More detailed information regarding the selection of hydraulic fluids and their application limits can be found in our Data Sheets RA 90 220 (Petroleum Oil), RA 90 221 (Biodegradable Fluids) and RA 90 223 (Type HF–Fire Resistant/Synthetic Fluids).
When operating with environmentally compatible fluids (Bio- degradable) or Fire Resistant (Type HF synthetic fluids) possible reduction of the operating specifications may be required. Please consult with us and your fluid supplier.
Operating Viscosity Range In order to obtain optimum efficiency and service life, we recommend that the operating viscosity (at normal operating temperature) be selected from within the range.
Optimum Viscosity (⎨opt) 80...170 SUS (16...36 mm2/s)
Limits of Viscosity Range The limiting values for viscosity are as follows:
Absolute Minimum Viscosity (⎨min) 60 SUS (10 mm2/s) Only for short periods at max. permissible leakage oil temperature tmax = 195°F (90°C)
Maximum Viscosity (⎨max) 4600 SUS (1000 mm2/s) Only for short periods during cold start-up
Selection Diagram
Notes on Hydraulic Fluid Selection In order to select the correct fluid, it is necessary to know the operating temperature in the tank (open circuits) in relation to the ambient temperature.
The hydraulic fluid should be selected so that, within the operating temperature range, the fluid viscosity is within the optimum range ⎨
opt (see shaded area of the selection diagram). We recommend
that the higher viscosity grade is selected in each case.
Example: At an ambient temperature of X°, the operating tempe- rature in the reservoir is 140 °F (60 °C). In the optimum operating viscosity range ⎨opt, (shaded area), this corresponds to viscosity grades VG 46 or VG 68, VG 68 should be selected.
Important: The leakage fluid (case drain fluid) temperature is influenced by pressure and speed and is typically higher than the tank temperature. However, maximum temperature at any point in the system must be less than 195°F (90°C). Temperature range (See Selection Diagram) tmin = –13° F (–25° C)
tmax = +195° F (+90° C)
Victory Pump Manufacturing
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Variable displacement pump A4VSG, series 1 and 2 Hydraulic Fluid (continued)
Bearing flushing For a reliable continuous operation bearing flushing is required with the following operating conditions:
– Applications with special fluids (non mineral) due to limited lubricity and narrow temperature range
– operation with mineral oils, however with marginal conditions for temperature and viscosity
– with vertical mounting (shaft up). In order to ensure lubrication of front bearing and shaft seal, we recommend bearing flushing.
The bearing flushing port "U" is located in the mounting flange area of the pump. The flushing oil flows through the pump's front bearing and leaves via the case drain.
We recommend the following flushing flows:
S ize 40 71 125 180 250 355 500 750 1000
Filtration of the Hydraulic Fluid (Axial Piston Unit) In order to guarantee reliable operation, the hydraulic fluid must be maintained to a minimum cleanliness level of:
to NAS 1638 class 9, to SAE class 6, ASTM, AIA, or to ISO/DIS 4406 SAE J1168 class 18/15 is required.
This may be achieved, for example, with filter elements
type…D 020… (see RA 31 278)
Hence the following filtration ratio is achieved
®20 ratio ε 100.
If a filter is installed in a boost circuit in the factory (code F), the following sizes of filter will be fitted dependent upon the size of the axial piston unit as standard, and fitted with a visual/ electrical plugging indicator.
lbf loading of (N) drive shaft max. radial force F
q max lbf (N)
Installation notes Optional installation position. The pump housing must be filled with fluid during commissioning and stay full when operating. In order to obtain the lowest noise level, all connections (suction, pressure, case drain ports) must be linked by flexible couplings to tank.
Avoid placing a check valve in the case drain line. This may be permissible in individual cases, but only after consultation with us.
Calculation of size
Flow V
g • n • ⎜
v V
g • n • ⎜
v
Q = gpm Q = L/min) = Geometric displacement per rev. - in3 (cm3) n = Speed rpm (rpm)
T Case drain port 1 1/16-12 UN-2B (plugged) E Boost port 3/4-16 UNF-2B K ,K Flushing ports 1 1/16-12 UN-2B (plugged)
2 3
R (L) Fluid fill and air bleed port 1 1/16-12 UN-2B for exact location see control data sheets
U Flushing port 7/16-20 UNF-2B; 0.47(12) deep (plugged)
Victory Pump Manufacturing
Variable displacement pump A4VSG, series 1 and 2
Summary of controls
MA Manual control (see RA 92 072)
Stepless adjustment of displacement by means of handwheel.
EM Electric motor control (see RA 92 072)
Stepless adjustment of displacement by means of electric motor with control spindle. With a programmed sequence control various intermediate displacements can be selected by means of built-on limit switches or potentiometer.
HD Hydraulic control pilot pressure dependent
(see RA 92 080)
Stepless control of displacement dependent on pilot pressure signal. The displacement is pro- portional to the pilot pressure. Optional: Pilot pressure characteristic curves (HD1, HD2, HD3)
Pressure control (HD.A, HD.B, HD.D)
Remote pressure control (HD.GA, HD.GB, HD.G)
HP control (HD1P)
Electrical pilot pressure control (HD1T) HW Hydraulic control
with rotary servo (see RA 92 068, in preparation)
Infinite adjustment of the pump flow as a function of the angle position (sin. ®) of the pivot. Optional: with hyperbolic horsepower control swiveling one side of center only (HWP)
1
Application: – 2 point control
on the control volume in port X 2
and X .
Variable displacement pump A4VSG, series 1 and 2
HM1/2/3 Hydraulic flow control flow dependent
(see RA 92 076)
The pump displacement is infinitely adjustable, dependent
– basic control device for servo- or proportional control
EO1/2 Hydraulic control with proportional valve
The stepless displacement control is accom-plished with a proportional valve with electrfeedback of swivel angle.
.
Electronic control Optional: Short circuit valve (EO1K, EO2K) Without valves (EO1E, EO2E)
HS, HS1, HS3 Hydraulic control with servo or proportional valve
The stepless displacement control is accom- plished by means of a servo or proportional
valve with electric feedback of swivel angle. Electronic control Optional: Servo valve (HS/ HS1) Proportional valve (HS3) Short circuit valve (HS1K, HS3K) Without valves (HSE, HS1E, HS3E). The HS3P-control is equipped with built-on
pressure transducer, which makes it suitable for pressure- and power control (Example: HS) (HS3, see RE 30 021)
DS1 Speed control secondary controlled
(see RA 92 076)
(see RA 92 076) (see RA 92 055)
(Example: HM1)
The speed control DS1 controls the secondary unit (the motor) in such a manner, that this motor supplies sufficient torque to maintain the required speed. Hooked up to a system with constant pressure, this torque is proportional to displacement, thus to swivel angle.
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Variable displacement pump A4VSG, series 1 and 2 LR.N Hydraulic control
pilot pressure dependent basic position V
(see RA 92 064)
g min
With overriding power control. Single sided operation. The displacement is proportional to the pilot pressure in P . The additional hyperbolic power control is overriding the pilot pressure signal and holds the preset power constant. Optional: Pressure control (LR2DN) Pressure control, remote (LR2GN) HP-characteristic, remote (LR3N, LR3DN, LR3GN)
DR Pressure control (see RA 92 060)
Single sided operation Maintain a constant pressure in a hydraulic system Adjustment range 290...5100 psi (20...350 bar) Optional: Remote control (DRG)
DP Pressure control for parallel operation
(see RA 92 060)
Single sided operation Suitable to maintain a constant pressure in a system with multiple axial piston pumps A4VSG in parallel operation. Optional: Flow control (DPF)
Variable displacement pump A4VSG, series 1 and 2 Through-drive Axial piston units A4VSG can be supplied with a through-drive capability, as shown in the ordering code on page 3:
It is recommended that no more than three individual pumps are coupled in series.
Included in the supply are: Coupling, fixing screws, seal and an intermediate flange (if required).
Combination pumps
Two or more independent circuits are available to the user when
combination pumps are used. 1. If the combination pump consists of 2 Brueninghaus Hydro-
matik units and if it is supposed to be delivered as an assembled unit, the two odering codes are to be combined with the "+" symbol. Ordering example: AA4VSG 125 EO1/22R – PKD60K169F + AA4VSG 71 HM1/10R – PSD60N000N
1.1 Please see data sheet RA 90 139 (in preparation) if a gear pump or radial piston pump is to be mounted as a combination pump at the factory. This data sheet lists the pumps which can be mounted and they are included in the ordering code of the
Dependent upon the application, the following auxiliary pumps and/or piping are available: Ordering example (metric): A4VSG 125 EO1/22R – PPB10H029F A4VSG with auxiliary pump piped up for boost circuit A4VSG 71 EO1/10R – PPB10H059F A4VSG with one auxiliary pump piped up for a common boost and pilot supply circuit, at speeds of > 2800 rpm.
It is recommended that no more than three individual pumps are coupled in series. When planning a pump combination with equal pump sizes (i.e. 125+125) and controls HD.P, HD.T and HD.U it is necessary to consult us.
